spring - @ControllerAdvice 异常处理方法不会被调用

Question

我有以下 Controller 类

package com.java.rest.controllers;
@Controller
@RequestMapping("/api")
public class TestController {

@Autowired
private VoucherService voucherService;


@RequestMapping(value = "/redeemedVoucher", method = { RequestMethod.GET })
@ResponseBody
public ResponseEntity redeemedVoucher(@RequestParam("voucherCode") String voucherCode) throws Exception {
    if(voucherCode.equals( "" )){
        throw new MethodArgumentNotValidException(null, null);
    }
    Voucher voucher=voucherService.findVoucherByVoucherCode( voucherCode );
    if(voucher!= null){
        HttpHeaders headers = new HttpHeaders();
        headers.add("Content-Type", "application/json; charset=utf-8");
        voucher.setStatus( "redeemed" );
        voucher.setAmount(new BigDecimal(0));
        voucherService.redeemedVoucher(voucher);
        return new ResponseEntity(voucher, headers, HttpStatus.OK);

    }
    else{
        throw new ClassNotFoundException();
    }
};

}

对于异常处理，我使用 Spring3.2 建议处理程序如下

package com.java.rest.controllers;


@ControllerAdvice
public class VMSCenteralExceptionHandler extends ResponseEntityExceptionHandler{

@ExceptionHandler({
    MethodArgumentNotValidException.class
})
public ResponseEntity<String> handleValidationException( MethodArgumentNotValidException methodArgumentNotValidException ) {
    return new ResponseEntity<String>(HttpStatus.OK );
}

 @ExceptionHandler({ClassNotFoundException.class})
        protected ResponseEntity<Object> handleNotFound(ClassNotFoundException ex, WebRequest request) {
            String bodyOfResponse = "This Voucher is not found";
            return handleExceptionInternal(null, bodyOfResponse,
              new HttpHeaders(), HttpStatus.NOT_FOUND , request);
        }

}

我已将 XML bean 定义定义为

<context:component-scan base-package="com.java.rest" />

Controller 抛出的异常不被 Controller 通知处理器处理。我已经用谷歌搜索了几个小时，但找不到任何引用为什么会发生这种情况。我按照 http://www.baeldung.com/2013/01/31/exception-handling-for-rest-with-spring-3-2/ 的描述进行了操作在这里。

如果有人知道，请告诉为什么处理程序没有处理异常。

Answer 1

我找到了解决上述问题的方法。实际上@ControllerAdvice 需要在 XML 文件中声明 MVC 命名空间。或者我们可以使用带有@ControllerAdvice 注解的@EnableWebMvc。